<!DOCTYPE html>
<head>
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<link rel="author" title="Sammy Gill" href="mailto:sammy.gill@apple.com">
<link rel="help" href="https://drafts.csswg.org/css-align-3/#baseline-export">
<link rel="help" href="https://drafts.csswg.org/css-writing-modes-4/#line-under">
<meta name="assert" content="Line under edge of vertical-lr/sideways item is at its block start edge">
<style>
.flexbox {
    display: flex;
    writing-mode: vertical-lr;
    text-orientation: sideways;
    align-items: baseline;
    background-color: red;
    position: relative;
}
.item {
    width: 50px;
    height: 50px;
    background-color: green;
}
.wide {
    width: 100px;
}
.absolute {
    position: absolute;
    top: 50px;
    left: 50px;
}
</style>
</head>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<body>
    <div class="flexbox">
        <div class="item wide"></div>
        <div class="item"></div>
        <div class="item absolute"></div>
    </div>
</body>
